What the papers say - January 29

Growing challenges for Theresa May and her leadership over Brexit are at the top of the agenda for a series of papers on Monday.

Several also carry images of an emotional Roger Federer, after the Swiss player became the first man in tennis history to win 20 grand slam finals with victory at the Australian Open.

The Daily Telegraph says it has seen a message sent by energy minister Claire Perry in which she described some hard-line Brexiteers as "swivel-eyed" - a sign of divisions over Brexit at the highest levels of the Tory party, according to the paper.

The Daily Express says Mrs May has been put on notice by senior party members that she faces the sack if she backslides on Brexit.

Meanwhile a looming row between London and Brussels over what influence the UK retains over EU laws agreed by the bloc after Brexit day threatens to delay a deal over the transition period, the Financial Times reports.